Remove the FrameSizeLocals field which appears to be unused (write-only).

src/IceTargetLoweringX8632.cpp

 //===- subzero/src/IceTargetLoweringX8632.cpp - x86-32 lowering -----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the TargetLoweringX8632 class, which
@@ skipping 385 matching lines @@
 void TargetX8632::initNodeForLowering(CfgNode *Node) {
   FoldingInfo.init(Node);
   FoldingInfo.dump(Func);
 }
 
 TargetX8632::TargetX8632(Cfg *Func)
     : TargetLowering(Func),
       InstructionSet(static_cast<X86InstructionSet>(
           Func->getContext()->getFlags().getTargetInstructionSet() -
           TargetInstructionSet::X86InstructionSet_Begin)),
-      IsEbpBasedFrame(false), NeedsStackAlignment(false), FrameSizeLocals(0),
+      IsEbpBasedFrame(false), NeedsStackAlignment(false),
       SpillAreaSizeBytes(0) {
   static_assert((X86InstructionSet::End - X86InstructionSet::Begin) ==
                     (TargetInstructionSet::X86InstructionSet_End -
                      TargetInstructionSet::X86InstructionSet_Begin),
                 "X86InstructionSet range different from TargetInstructionSet");
   // TODO: Don't initialize IntegerRegisters and friends every time.
   // Instead, initialize in some sort of static initializer for the
   // class.
   llvm::SmallBitVector IntegerRegisters(RegX8632::Reg_NUM);
   llvm::SmallBitVector IntegerRegistersI8(RegX8632::Reg_NUM);
@@ skipping 599 matching lines @@
                           LocalsSize[NodeIndex];
       }
     } else {
       NextStackOffset += Increment;
     }
     if (IsEbpBasedFrame)
       Var->setStackOffset(-NextStackOffset);
     else
       Var->setStackOffset(SpillAreaSizeBytes - NextStackOffset);
   }
-  this->FrameSizeLocals = NextStackOffset - SpillAreaPaddingBytes;
   this->HasComputedFrame = true;
 
   // Assign stack offsets to variables that have been linked to spilled
   // variables.
   for (Variable *Var : VariablesLinkedToSpillSlots) {
     Variable *Linked = (llvm::cast<SpillVariable>(Var))->getLinkedTo();
     Var->setStackOffset(Linked->getStackOffset());
   }
 
   if (ALLOW_DUMP && Func->isVerbose(IceV_Frame)) {
@@ skipping 3996 matching lines @@
   case FT_Asm:
   case FT_Iasm: {
     OstreamLocker L(Ctx);
     emitConstantPool<PoolTypeConverter<float>>(Ctx);
     emitConstantPool<PoolTypeConverter<double>>(Ctx);
   } break;
   }
 }
 
 } // end of namespace Ice